flaking test: `TestAddWithParser`

[petr-muller]

I have seen this twice over the weekend, seems like this test started flaking recently:

=== Failed
=== FAIL: pkg/config/secret TestAddWithParser/1 (2.00s)
    agent_test.go:169: expected value 2 from generator, got 1
time="X0X6-0X-X5TXX:04:44Z" level=warning msg="Error loading secret file." error="stat /tmp/547X33X59: no such file or directory" secret-path=/tmp/547X33X59
time="X0X6-0X-X5TXX:04:44Z" level=warning msg="Error loading secret file." error="stat /tmp/XX3958X448: no such file or directory" secret-path=/tmp/XX3958X448
time="X0X6-01-X5T11:04:45Z" level=warning msg="Error loading secret file." error="stat /tmp/1X39581448: no such file or directory" secret-path=/tmp/1X39581448
time="X0X6-01-X5T11:04:45Z" level=warning msg="Error loading secret file." error="stat /tmp/547X33X59: no such file or directory" secret-path=/tmp/547X33X59
time="X0X6-01-X5T11:04:45Z" level=error msg="Error loading secret." error="strconv.Atoi: parsing \"not-a-number\": invalid syntax" secret-path=/tmp/TestAddWithParser030X0674637/001/secret
=== FAIL: pkg/config/secret TestAddWithParser (0.00s)

https://prow.k8s.io/view/gs/kubernetes-ci-logs/pr-logs/pull/kubernetes-sigs_prow/601/pull-prow-unit-test/2015379343022231552
https://prow.k8s.io/view/gs/kubernetes-ci-logs/pr-logs/pull/kubernetes-sigs_prow/525/pull-prow-unit-test/2015813939778031616

[petr-muller]

/kind bug